2645399 has 2 divisors, whose sum is σ = 2645400. Its totient is φ = 2645398.

The previous prime is 2645393. The next prime is 2645413. The reversal of 2645399 is 9935462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2645399 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322699 + 1322700.

It is an arithmetic number, because the mean of its divisors is an integer number (1322700).

2^2645399 is an apocalyptic number.

2645399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645399 is an equidigital number, since it uses as much as digits as its factorization.

2645399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 2645399 is about 1626.4682597579. The cubic root of 2645399 is about 138.3026160406.

The spelling of 2645399 in words is "two million, six hundred forty-five thousand, three hundred ninety-nine".